I mentioned this in another thread but now that the thought has me, I am very remiss that it did not play out this way.

After Magneto gets stabbed, Rogue takes his powers and goes to buy them time while he dies inside and we see Magnetic Rogue fighting Sentinels to the death with Blink and co.

I was fine with cutting Paquin, but now that I put two minutes of logic to it, they missed a golden opportunity to redeem her like they did everyone else in X3. If she could have had her hero moment, at Magneto's expense no less...wow. That would have been cool.

This is the problem. Rogue can only have her moment at another character's expense.

And it doesn't make sense that Rogue, who could only take someone else's power for a limited time (yes, I'm aware of how she got her strength and flight in the comics) could seamlessly replace Kitty without interrupting the "spell".